Method of forming outside double picks on round seams



Se t. 192

p 6 l 7 A. GUENTHART METHOD 0F 'FORMINGOUTSIDE DOUBLE PICKS 0N ROUND SEAMSA Filed Jan. 5. 1926 Patented Sept. 6, 1927. l l

'enormi-summarises?, or Winnen, citniroitiviii.V

'METHOD FORMING OUTSDE DOUBLEPICKS ON ROND I Application filed January My invention relates to the inethod of forming outside double pic rs on round seams and to the dies used tor making suc-h picks; e

An object of my inventionjis` to make an outside double vpick on round seams as uti'- lized in. oil wellcp'erations.' 'The previous.v

practice has been to rvetthe seams ot built up'casing sections'which are placed in the well to prevent collapse of the wall, thev well boring tools.l pumps and` other appliances extending downwardly through the casing. It is necessary tol have the casing smooth on the inside surface on Vaccount of the various tools Vused therein as these would readily knock oil the rivets it theyj-preyjected inwardly, therefore in the riveted type of rounds'eams theA custom hasfbeeii to use flat headed rivets securing an inner tube section to an outer tube section. 3 -i/iis these tube sections are made ot thin metal the rivets Jfrequently shear and hence the casing sectionlis useless. 'l o It 'is the common practice to buildy up a casing length, sayup to 2O teet in length, by utilizing short tubular sections of sheet metal riveted together at the seams with counter-sunk rivets Aon Vthe inside surface, these tubes sections telescoping one on the 't other inwardly and outwardly continuously .until the full length ci'` vthe tube is made up. The "individualtube sections` are rarely over three eetin length and as the tube sections are staggered to break joint,an overlapping of about al foot and a half is given at' each end.v Y f l' To hold these round seams together, they have in the past been riveted as above described, with ythe counter-sunk rivets on the l '4L-4 of Fig. 2, on an enlarged scale, idicatthe like formed in vsheet metal; thus orining an indentation onone side ot the metal and a slight projection on the other side and causing two round rings or' tubes of 'metal to hold together;

My outside double pick :tor round seams 'comprises bulging` two concentric rings oi" l -1 V' metal fitting one tight on the other'outwardly from the insidesurface vandfat'the saine time depressing-the rapen of what would be a single pick",inwardly.` The apex is only l depressedinwardly a sufiicient extent so that c i? esserlo# @stand .inwardly berend] the in 'jectionyv Y e My invention will kbe more readily under- 5, rieee.- szriai no. 79,496.11'

side surface of Vthering.v `'Ihereiior'e eX-l `amined Vfrom t-he inside my outside double pick has an* annular! depression onathefi'n side and an annular pressed out part on the outside.' `When successive rings are built up with this type of pick','it is .practically impossible to pull them apart as there -arevno rivets to shear and thedouble bending Vofthe metal forms an interlocking fit. Moreover, with this type of jointing` there 'is no danger of individual sections comprising 4a single inside tube" and anfouter tube thereon telescoping further than intended as the interlocking double tudinal movement. 1 f My 'method consists in the Aina-nner ot pick prevents longi-v I v 70 forming the above mentioned type of joint the die acting onthe inside having van annular rini'with a central depression cooperating with an outside die having a peripheralV edge, an annular recess anda centralpro- 'stood from the following description and drawings, in which; f

Fig. l represents f a well casing 'k section built up of a seriesA of rings fitting oneinto the other and secured by my form of outside double pick securing-y eachv of the tubev sec-l tionsl to the next adjacent. l

Fig. Qis an 'enlargedsection of Figfl, showing the mannerofmaking up the casing 'and' a ysuitable arrangement of doubler picks.

Fig. 31s a section through Fig.` 2, onthe lineB-S, illustrating someot .the picks in vertical section.

4L isa horizontalsectioii on the line Fig.

ing a `suitable type of longitudinal joint.

Fig. 5 is a det-ail perspective view of ay -.1netal rings in the formation of y.my outside double pick. 1 Y

Fig.` 8 is a section showing in vpartial per- 'f f `io5, Referring particularly to Figsgfl to 4, casing section-suitable Jfor-work inoil wells spective adouble pick.

is indicated by the numeral 1.' This i'sjbuilt up of a plurality of telescopically fitting when@ of a. :am sans as Shown ier iccv . ticularly in Fig. 3.

An inner tube 2 fits telescopically inside of an outer vtube 3, these being secured together by a double pick t. The tubes are made with a longitudinal seam 5 which for the inside tubes have rivets 6 with counter-sunk heads on both ends These are preferably lap joint seams. The outer tube sections 3 have a longitudinal lap 7 secured together by rivets 8 with countersunk heads on the inside and rounded heads on theoutside. lVith a series of double picks 4t around the periphery'of these tele scoping' tube sections they are held rigidly together so that they cannot be further telescoped together or pulled apart in any ordi nary usage.

These tube sections 2 and 3 may be of any suitable length and are rearly over three feet in length each. Thus the overlapping of the sections is rarely 'of a foot and a half. However, such distances may be departed from and my pick may be utilized in connecting long cylinders or the like together, end to end. Moreover, with my type of pick it is not necessary that'the ends of the individual tube sections abut together. YHowever, as illustrated, in conformity with the usual practice, the inner series of the-.sections have abutting end joints 9 and the outer tube sections have abutting joints 10.

In the manner of forming my double pick I utilize dies as' illustrated particularly in Fig. 7, in which the inner die 11, preferably formed cylindricah'has an annular projection 12 sloping outwardly from the periphera edge 13, then having a downward curve indicated by the numeral 14 with a reverse bottoniv curve indicated by the numeral 15. Instead of these various portions of the die being curved as above described they can bev made angular if the material to be operated upon can be given sharp bends.

The outside die 16 has an annular recess 17 having an inward curve 18 from the peripheral edge 19, an outward curve 2O and a projection 21 in the center having a reverse curve. These curved surfaces may be formed angular if desiredl or of any other suitable Vshape so :that the inner and outer dies will conform and coopera-te together.

AIn Fig. 7, an inside tube 2 is indicated as the lower and the outside tube 3 as the upper sheet of metal. When the dies are forced together it will therefore be seen that the metal is forced outwardly forming an annular depression 22 as indicatedin Figs. 6 and 8 this forming an annular projection or bottom Q3 on the outside as indicated in Figs. 5 and 8. The projection 21 holdsthe metal inwardly forming a central socketQa on the outside as f indicatedinFigs. 5 and 8; this forming a Ycentral circular'surface 25A on the inside as indicated infFigs. 6 andS. f

f The dies: are SQQ' Shaped'. and theperato performed in such a manner so that the circular surface 25 would be on the same radius as the inner surface 26 of the tube section.V

It would not extend inwardly of such surface and preferably should be as close as possible to such surface in order to have as sharp bends as possible in the double pick.

It will thus be seen that the round or circular seams intubular or cylindrical sections are held together from relative longitudinal movement by these double curves,formed` in the sheet metal; that is, the annular depress sion 22 from the inside forcingthevsheet metal outwardly forming the annular projection 23 and the inwardly formedcen-Y tral socket 24 causes thev binding of two of vjoint for round seams may be utilimd with other types of cylindrical tubes and yfor many different purposes other than that above'described. The specific shape of double picks and thespecitic shape of dies ma y also be changed from those illustrated to suit different circumstances. TheA type of double pick oint however, so formed and the method of making would be within the spirit .of my invention as set forth in the-descripH tion, drawings and claims.

Having described my invention, what I claim is: i

1. The method of making outside double picks on round seams, comprising positioning tubular sections concentrically and in close contact, forcing the metal of both,r sections outwardly forming an annular depression on the inside and an annular projection on the outside, at the same time forcing a portion of the metalv in the center of the annuluses inwardly, formingk a centrally positioned socket on the outside and a centrally positioned substantially circular surface on the inside. i

2. The method of making outside double picks as claimed in claim 1, in which theinward pressing to form the socket is `insufficient to` thrust the circular surface on the inside inwardly beyond thesurface of th adjacent underformed material. .5

3; The method offasteningtogether telescopedtube sections, consistingof pressing outwardly circular areasofthe sections and pressing ,l inwardly c portions 0f vsaid areas, thus forming buttons on the inside of the in- 1,641,809 v j S scoped tube sections, which consists of lapplying adie to the inside of the inner section, which die has an annular Vprojection l thereon, forcing the metal of both sections outwardly thereby, land simultaneously applyng a die to the outside ofthe outer section opposite the recess within the annular projection on vthe inner die to hold the metal of the sections within the annular projection from being forced outwardly by the inner die.

5. The method of making outside double picks .on round seams, comprising positioning tubular sections concentric one to the other and in close engagement, forcing metal outwardly in a small annular ring, and at the same time holding the central portion inwardly.

6. The method of fastening vtogether tele-j scoped tube sections, whlch consists of forming projections upon the outer section by pressing portions of the inner section outwardly, and pressing the centers of the portions inwardly in such a manner as to form restricted circular recesses on a small inside area of the inner section, the bottoms of which are completely exposed to the inside of the inner section.

7. The method of fastening together telescoped tube sections, whichV consists of applying an inwardly directed pressure to small circular areas ron the outside of the outer section, and simultaneously applying pressure to portions of the inside `of the inner section about the mentioned. areas, and thus deforming the metal of both sections.

8. rThe method of fastening together telescoped tube sections, which consists of applying a die to the inside of the inner sec-v j tion, which diehas a small vannular projection thereon, and'for'cing` the metal of both sections outwardly, thereby and at the same time holding `a portion of themetal being forced outwardly, inwardly lagainst the-action of said die.`

v 9. The method of fastening together telescoped tube sections, which consists of forming projections upon the outer section by' pressing spots on the inner section outwardly, andfholding the centers of the spots inwardly in such a manner as Vto form recesses around said spots on the inside of the inner section, the bottomsl of which are completelyexposed to the inside of the inner section.

lO. The method of fastening together telescoped Vtube sections, which consists ofpressing outwardly spots on the sections, and

holding inwardly portions of said spots,-

thus forming projections on the inside of the inner section, the bottoms of which are completely exposed tothe inside of the inner section,

11. The method of fastening together tele` scoped tube sections, which consists of applying an' inwardly directed pressure to spots on the outside -of the outer section, and Y simultaneously applying pressure to portions of theinside ofthe inner section` abouty the` mentioned spots, and thus deforming the Ascoped tube sections, which comprises press- 'Y ing outwardly spots on the surfaces of the j sections, and holding inwardly portions of said spots lthus forming projections on vthe insideof the linner section, the bottoms of.,

which are completely exposed to the inside of the inner section.

In testimonyl whereof I have signed ymy name to this specification.

' ADOLPH GUENTHART. i. 

